You know - I have never understood why this doesn't happen in droves! Especially, this time of year. It seems it would be so easy to follow a UPs truck during the day when most folks aren't home. If they are home they'll probably answer when he knocks. After thaat it just a pick-up and walk away.
I have to admit, I've never heard of this being done but don't know why. ..and yes the parent has the little girl doing this!